Regulator for air-compressors



v c. WAINWRIGHT. REGULATOR FOR AIR COMPRESSORS.

APPLICATION FILED APR. 13- I9I8- Patented Sept. 14, 1920. I

[N VEN TOR.

WITNESSES ATTORNEY.

PATENT QFFEQE.

CHARLES WAINWRIGHT, 0F ERIE, PENNSYLVANIA.

REGULATOR FOR AIB-COMPRESSORS.

'- Application filed April s,

To all whom it may concern:

Be it known that 1, CHARLES WAINWRIGHT, a citizen of the United States of America, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Regulators for Air-Compressors, of which the following is a specification.

This invention relates to regulators or unloaders especially adapted to be used in conjunction with air compressing machines and it consists in the novel features hereinafter described and claimed.

An object of the invention is to provide a regulator or unloader of the character stated which is of simple and durable structure and which is dependable in its 0 eration to regulate the air passing throng the same and to perform its function without fluttering and in a noiseless manner.

With this object in view the regulator or unloader comprises a body provided with a chamber and having a channel leading therefrom. The body is provided with a seat which surrounds the channel and a solid piston is slidably mounted in the body and providedewith a seat adapted to normally engagefthe seat of the body whereby the channel leading from the chamber 1s normally closed. Spring and weight means operate upon the piston to retain the same toward the seat oi the body. A bonnet and a cap are located upon the'body and house the spring and the weight, a vent is com nected with the channel and a screw is adjustably mounted with relation to the vent whereby the transverse sectional area of the passageway through the vent may .be increased or diminished as desired or the vent may be completely closed.

In the accompanying drawing The figure is a vertical sectional View of l the regulator.

The regulator is of the unloadingtype, and comprises a body I, provided with an internal chamber (M). A nipple (O) is connected with the body I, and communicates with the lower portion of the chamber M. A supply pipe (A) is connected with the nipple G and is designed to lead from the discharge chamber of an air com ressor. A seat F, is provided in the body at the bottom of the chamber M and centrally thereof. A channel E, passes through the seat and communicates at its lower edge with a pipe B designed to be connected. with the Specification of Letters-Patent.

1918. Serial No. 228,424.

apparatus to be controlled. A vent C, leads laterally from the channel E and connects with the atmosphere and a. screw valve D is adjustably mounted in the body I and may be moved across the vent C. A bonnet J, is mounted upon the body I, and is provided with an annular shoulder N which extends Within the lripper portion of the chamber M. A cap is ad'ustably mounted in the top of the bonnet l. A piston H, is slidably mounted in the chamber M and is provided at its center with a seat G adaptedto normally engage the seat F hereinbefore described. A spring K is housed within the bonnet J and cap M and its lower end bears a ainst an annular flange -L, of a weight and its upper end bears against the top of the cap M. The lower end of the weight P bears against the upper side of the piston H at the centerthereof. c

The operation of this device is as follows, the air from the tank or receiver or dis charge line of the compressor is conveyed through/the pipe A at a predetermined pressure determined by the adjustment of the spring K. The piston H moves upward, which lets compressed air which is in the chamber M, into the channels E, whence it is'conducted by the pipe B, to those parts of the compressor which are to be operated by compressed air for the control and regulation of the compressor. When the redetermined-pressure within chamber falls below a certain pressure, the piston H, is returned to its normal position, that is to say, that the seats F and G, come in contact with each other which means that the chan-' nel E is no longer'in communication with the chamber M, and all air within the pipe B or those parts connected with the same is allowed .to escape through the vent C controlled by the adjustable screw D. This of course renders all those parts connected.

withthe source of supply inoperative.

The solid piston H constitutes an important feature of my invention, inasmuch as its movements are positively limited and hence positive regulation may be had.

Having thus described the invention what is claimed is An unloader having a chamber, means extending laterall from the chamber to connect said cham er with a source of compressed air su ply, a fiat valve seat on the inner end wall of the chamber, a conduit of considerably less area than the fiat valve Patented Sept. 14, iaeo.

seat leading through said-seat and adapted piston to said flat surface, whereby When to be connected with apparatus to be conthe piston lifts the additional pressure in trolled, aspring-pressed piston having a fiat the chamber Will cause the piston to jump 10 surface opposed to the valve seat and arto its limit stop. 1

5 ranged to permit compressed air from the i In testimony whereof I aflix my signature.

source of supply to act against said surface, and a stop at the opposite side of the CHARLES WAINWRIGHT. 

